JPH0977543A - Artificial lightweight aggregate and its production - Google Patents
Artificial lightweight aggregate and its productionInfo
- Publication number
- JPH0977543A JPH0977543A JP25673095A JP25673095A JPH0977543A JP H0977543 A JPH0977543 A JP H0977543A JP 25673095 A JP25673095 A JP 25673095A JP 25673095 A JP25673095 A JP 25673095A JP H0977543 A JPH0977543 A JP H0977543A
- Authority
- JP
- Japan
- Prior art keywords
- fly ash
- weight
- parts
- blast furnace
- furnace slag
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 239000010881 fly ash Substances 0.000 claims abstract description 52
- 239000002893 slag Substances 0.000 claims abstract description 43
- 239000002699 waste material Substances 0.000 claims abstract description 24
- 239000011521 glass Substances 0.000 claims abstract description 22
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 239000000440 bentonite Substances 0.000 claims abstract description 14
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 14
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 14
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 14
- 238000010304 firing Methods 0.000 claims abstract description 9
- 238000000465 moulding Methods 0.000 claims abstract description 5
- 239000004927 clay Substances 0.000 claims abstract description 3
- 238000005187 foaming Methods 0.000 claims description 17
- 239000011230 binding agent Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 20
- 238000010521 absorption reaction Methods 0.000 abstract description 13
- 230000005484 gravity Effects 0.000 abstract description 5
- 239000002245 particle Substances 0.000 abstract description 5
- 239000002440 industrial waste Substances 0.000 abstract description 3
- 238000010298 pulverizing process Methods 0.000 abstract 1
- 239000008188 pellet Substances 0.000 description 9
- 239000000843 powder Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000005469 granulation Methods 0.000 description 3
- 230000003179 granulation Effects 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229910000805 Pig iron Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000003651 drinking water Substances 0.000 description 2
- 235000020188 drinking water Nutrition 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- LFYJSSARVMHQJB-QIXNEVBVSA-N bakuchiol Chemical compound CC(C)=CCC[C@@](C)(C=C)\C=C\C1=CC=C(O)C=C1 LFYJSSARVMHQJB-QIXNEVBVSA-N 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- -1 of course Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/009—Porous or hollow ceramic granular materials, e.g. microballoons
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/023—Fired or melted materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/027—Lightweight materials
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、人工軽量骨材及
びその製造方法、特に、産業廃棄物である高炉スラグと
フライアッシュを有効利用して成るコンクリート用の軽
量骨材及びその製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial lightweight aggregate and a method for producing the same, and more particularly to a lightweight aggregate for concrete which effectively utilizes blast furnace slag and fly ash, which are industrial wastes, and a method for producing the same. Is.
【０００２】[0002]
【従来の技術】火力発電所のボイラー等で燃料として石
炭を用いると、いわゆる産業廃棄物として多量のフライ
アッシュが発生する。一年間に発生するフライアッシュ
はおよそ４００万トンであり、そのうちの約半分がセメ
ントコンクリート等の建設、土木分野、窯業分野で有効
利用されている。しかしながら、近年の動向をみると、
フライアッシュの発生量は確実に増加しつつあるにも関
わらず、有効利用率は５０％以下で推移しており、環境
保全の立場からも、フライアッシュの有効利用が更に促
進されることが望まる。When coal is used as a fuel in a boiler or the like of a thermal power plant, a large amount of fly ash is generated as so-called industrial waste. The fly ash generated in one year is about 4 million tons, and about half of the fly ash is effectively used in the construction of cement concrete, the civil engineering field, and the ceramics field. However, looking at recent trends,
Although the amount of fly ash generated is steadily increasing, the effective utilization rate has remained below 50%, and it is hoped that the effective use of fly ash will be further promoted from the standpoint of environmental conservation. It
【０００３】このようなフライアッシュの有効利用の一
つとして、フライアッシュを主原料とし、これを造粒、
発泡焼成して得られる人工軽量骨材がある。しかしなが
ら、フライアッシュは、化学的・物理的性状のバラツキ
が大きいため、一定の製造条件で品質の安定した骨材を
大量に製造することが難しく、得られる骨材は、高吸水
率で強度も低いという問題点があった。As one of the effective utilization of such fly ash, fly ash is used as a main raw material and is granulated,
There is an artificial lightweight aggregate obtained by foaming and firing. However, since fly ash has a large variation in chemical and physical properties, it is difficult to manufacture a large amount of aggregate with stable quality under constant manufacturing conditions, and the resulting aggregate has high water absorption and strength. There was a problem that it was low.
【０００４】一方、高炉スラグは、溶鉱炉で銑鉄を製造
する際に、１４５０℃前後で溶融状態で排出されるもの
であり、その量は銑鉄生産量の約４割といわれている。
その発生量の大半は、路盤材、セメント原料、ロックウ
ール原料等として再利用が図られている。また、セラミ
ックスタイル、煉瓦、人工骨材として再利用しようとす
る研究もなされており、フライアッシュの場合より、そ
の有効利用率はかなり高いもののさらなる活用が期待さ
れる。On the other hand, blast furnace slag is discharged in a molten state at around 1450 ° C. when producing pig iron in a blast furnace, and the amount thereof is said to be about 40% of pig iron production.
Most of the generated amount is reused as roadbed materials, cement raw materials, rock wool raw materials, and the like. In addition, research is being done to reuse it as a ceramic style, brick, and artificial aggregate, and its effective utilization rate is considerably higher than that of fly ash, but further utilization is expected.
【０００５】さらに、高炉スラグの使用方法の一つとし
て、コンクリート粗骨材として使用することが知られて
いる。しかし、高炉スラグは表面に凹凸が多く吸水率が
高いので、コンクリート練り混ぜ時に、砕石を使用した
時に比べて添加水量が多量に必要なことから、作業条件
が不安定になる。かかる問題を回避する手段として、高
炉スラグを粉砕し、造粒・焼成する方法も考えられる
が、高炉スラグのみを十分に緻密化するためには１３０
０℃以上の高温が必要となるし、焼結してから軟化する
までの温度幅が狭く、製造上の工程管理が難しいという
問題がある。Furthermore, as one of the methods of using the blast furnace slag, it is known to use it as concrete coarse aggregate. However, since the blast furnace slag has many irregularities on the surface and a high water absorption rate, a large amount of added water is required when kneading concrete as compared with the case where crushed stone is used, which makes the working conditions unstable. As a means for avoiding such a problem, a method of crushing blast furnace slag and granulating / calcining is conceivable, but in order to sufficiently densify only the blast furnace slag, 130
There is a problem that a high temperature of 0 ° C. or higher is required, the temperature range from sintering to softening is narrow, and process control in manufacturing is difficult.
【０００６】[0006]
【発明が解決しようとする課題】従って、この発明は、
製鉄所から排出される高炉スラグと火力発電所から排出
されるフライアッシュとを主要原料とし、高強度、低吸
水率で、品質の安定した人工軽量骨材及びその製造方法
を提供することを目的とする。Therefore, the present invention is
An objective is to provide an artificial lightweight aggregate with high strength, low water absorption, and stable quality, and a method for producing the same, using blast furnace slag discharged from a steel plant and fly ash discharged from a thermal power plant as main raw materials. And
【０００７】[0007]
【課題を解決するための手段】前記目的を達成するため
に、この発明の人工骨材によれば、高炉スラグ及びフラ
イアッシュを主原料とし、これにベントナイト等の粘土
類及び所望により炭化珪素を添加した混合原料を造粒・
成形し、焼成してなること（請求項１）、高炉スラグ４
０〜６０重量部及びフライアッシュ６０〜４０重量部を
主原料とすること（請求項２）、廃ガラスをフライアッ
シュの一部に置換して用いること（請求項３）、フライ
アッシュ６０〜４０重量部のうち、５〜２５重量部を廃
ガラスで置き換えてなること（請求項４）、を特徴とす
る。In order to achieve the above-mentioned object, according to the artificial aggregate of the present invention, blast furnace slag and fly ash are used as main raw materials, and clays such as bentonite and optionally silicon carbide are added thereto. Granulate the added mixed raw material
Formed and fired (claim 1), blast furnace slag 4
0 to 60 parts by weight and fly ash 60 to 40 parts by weight as main raw materials (claim 2), replacing waste glass with part of fly ash (claim 3), fly ash 60 to 40 Of the parts by weight, 5 to 25 parts by weight are replaced with waste glass (claim 4).
【０００８】また、この発明の人工骨材の製造方法によ
れば、高炉スラグ４０〜６０重量部、フライアッシュ６
０〜４０重量部から成る主原料に、粘結材としてベント
ナイト等の粘土類及び所望により発泡補助材として炭化
珪素を添加、混合して成形し、１１００℃以上の温度で
焼成すること（請求項５）、フライアッシュ６０〜４０
重量部のうち、５〜２５重量部を廃ガラスで置き換えて
なること（請求項６）、を特徴とする。以下、この発明
を詳細に説明する。According to the method for manufacturing an artificial aggregate of the present invention, 40 to 60 parts by weight of blast furnace slag and fly ash 6 are used.
Clays such as bentonite as a binder and, if desired, silicon carbide as a foaming auxiliary material are added to the main raw material consisting of 0 to 40 parts by weight, mixed and molded, and fired at a temperature of 1100 ° C. or higher. 5), fly ash 60-40
Of the parts by weight, 5 to 25 parts by weight are replaced by waste glass (claim 6). The present invention will be described in detail below.
【０００９】[0009]
【発明の実施の形態】高炉スラグは製鉄工業の溶鉱炉で
副生する水滓スラグ、あるいは徐冷滓スラグの粉砕品、
好ましくは、平均粒径２５μｍ以下のものを使用する。
高炉スラグ単味で造粒・焼成しても、それ自身発泡成分
を含んでいないので加熱に伴って発泡が起こり難く軽量
骨材とは成らない。また加熱温度のわずかな上昇に伴っ
て急激な粘性の低下を起こし、骨材同士の融着や、形状
を維持出来ない等の問題がある。この発明では後述する
フライアッシュあるいはフライアッシュと廃ガラス粉末
の混合物をシリカ源として高炉スラグに混合することに
よって、比較的低温での液相形成を可能にし、軽量骨材
化を達成する。BEST MODE FOR CARRYING OUT THE INVENTION Blast furnace slag is a slag of water slag by-produced in a blast furnace of the steel industry, or a crushed product of slowly cooled slag slag,
Preferably, those having an average particle size of 25 μm or less are used.
Even if granulating and firing with blast furnace slag alone, since it does not contain foaming components by itself, foaming does not easily occur with heating and it does not become a lightweight aggregate. In addition, there is a problem that the viscosity is rapidly decreased with a slight increase in heating temperature, and the aggregates are fused and the shape cannot be maintained. In this invention, fly ash described below or a mixture of fly ash and waste glass powder is mixed with blast furnace slag as a silica source to enable liquid phase formation at a relatively low temperature and achieve lightweight aggregate.
【００１０】フライアッシュは、ＪＩＳで規定されるフ
ライアッシュは無論、通常原粉と称されるフライアッシ
ュ、及びシンダーアッシュ、あるいは流動床飛灰をも含
めた、石炭の燃焼方式如何に拘らず得られる広い意味で
の石炭灰全般を使用することができ、これらフライアッ
シュを造粒物の強度を確保するために必要に応じて粉砕
し、平均粒径約２５μｍ以下として使用することが望ま
しい。Fly ash can be obtained regardless of the combustion method of coal, including fly ash, which is usually called raw powder, and cinder ash, or fluidized bed fly ash, of course, fly ash specified by JIS. It is possible to use all kinds of coal ash in a broad sense, and it is desirable to crush these fly ash as necessary to ensure the strength of the granulated product and use it with an average particle size of about 25 μm or less.
【００１１】高炉スラグとフライアッシュの混合割合
は、高炉スラグ４０〜６０重量部、フライアッシュ４０
〜６０重量部とする。フライアッシュの含有量が４０重
量部未満であると、高炉スラグに対するシリカ源添加量
が不足し、低温での液相量が減少するので、良好な軽量
骨材を得難く成る。また、フライアッシュの含有量が６
０重量部を越えると、発泡が顕著と成りすぎて骨材表面
に開気孔を形成し、吸水率が大きく骨材強度も小さい骨
材しか得られない。The mixing ratio of blast furnace slag and fly ash is 40 to 60 parts by weight of blast furnace slag and fly ash 40.
-60 parts by weight. If the content of fly ash is less than 40 parts by weight, the amount of silica source added to the blast furnace slag becomes insufficient, and the amount of liquid phase at low temperatures decreases, making it difficult to obtain a good lightweight aggregate. Also, the content of fly ash is 6
When it exceeds 0 part by weight, foaming becomes excessively remarkable and open pores are formed on the surface of the aggregate, so that only an aggregate having a high water absorption rate and a small aggregate strength can be obtained.
【００１２】また、高炉スラグとフライアッシュの混合
に当たって、やはり廃棄物である廃ガラスをフライアッ
シュの一部に置換して用いることができる。すなわち、
廃ガラスは低温での液相形成に寄与し、フライアッシュ
４０〜６０重量部のうち、５〜２５重量部を廃ガラスで
置き換えて使用することができる。廃ガラスとしては、
飲料水の廃ビンガラス、食器用のガラス製品、通常の窓
ガラス等各種の廃ガラスを２０μｍ程度以下に粉砕して
用いることができる。Further, when mixing the blast furnace slag and the fly ash, the waste glass, which is also a waste, can be replaced with a part of the fly ash. That is,
Waste glass contributes to liquid phase formation at low temperatures, and 5 to 25 parts by weight of fly ash 40 to 60 parts by weight can be replaced with waste glass for use. As waste glass,
Various kinds of waste glass such as waste bottle glass of drinking water, glassware for tableware, and normal window glass can be crushed to about 20 μm or less and used.
【００１３】次ぎに、前記高炉スラグとフライアッシ
ュ、あるいはフライアッシュと廃ガラスを加えた主原料
に、ベントナイト等の粘土類および炭化珪素を添加混合
後、水を加えて成形、造粒する。粘土類は、造粒物の強
度を確保するための粘結材として３〜７重量％添加する
もので、ベントナイトの他、モンモリナイトやカオリン
等を使用することもできる。炭化珪素は、所望により発
泡補助材として０．０５〜０．３０重量％添加するもの
で、特に発泡源となる炭質物の含有量が小さいフライア
ッシュを用いる場合において、効果的に発泡の不足を補
い、品質の安定した軽量化を達成することができる。Next, after adding and mixing clay such as bentonite and silicon carbide to the main raw material obtained by adding the blast furnace slag and fly ash, or fly ash and waste glass, water is added to carry out molding and granulation. Clays are added as a binder to secure the strength of the granulated product in an amount of 3 to 7% by weight, and montmorillonite, kaolin and the like can be used in addition to bentonite. Silicon carbide is added in an amount of 0.05 to 0.30% by weight as a foaming auxiliary agent, if desired, and in particular, when using fly ash having a small content of carbonaceous matter as a foaming source, insufficient foaming is effectively prevented. In addition, it is possible to achieve a stable weight reduction in quality.
【００１４】成形、造粒方法に特に制約はないが、パン
ペレタイザーや押し出し成形機等による造粒が、成形の
容易性、工業的量産性の面から好ましい。次いで造粒物
を、ロータリキルン等の焼成炉により１１００℃以上、
好ましくは１１５０〜１３００℃の比較的低い温度で焼
成、冷却することで、この発明の良質な人工軽量骨材を
得ることが出来る。There are no particular restrictions on the molding and granulation methods, but granulation with a pan pelletizer, an extrusion molding machine or the like is preferable from the viewpoint of ease of molding and industrial mass productivity. Next, the granulated product is heated to 1100 ° C. or higher in a kiln such as a rotary kiln.
By firing and cooling at a relatively low temperature of preferably 1150 to 1300 ° C., a good quality artificial lightweight aggregate of the present invention can be obtained.
【００１５】[0015]
（実施例１〜５）高炉水滓スラグ（平均粒径約１２μ
ｍ）５０重量部、フライアッシュ（平均粒径約２０μ
ｍ）５０重量部、及び粘結材としてベントナイト３重量
部を混合した。この混合粉末に水１２重量部を添加し、
約４ｇを天秤で計り取り球状に造粒し、乾燥させたもの
を焼成用ペレットとした。ペレットを電気炉中、１２１
０〜１３００℃の温度内の所定の温度で５分保持するこ
とにより骨材とした。得られた骨材は、吸水率が１．２
％以下、絶乾比重が２未満、引っ張り強度が１５０ｋｇ
ｆ／ｃｍ2 以上の良好なものであった。結果を表１に示
す。この骨材は、吸水率が小さいため、構造用コンクリ
ートの軽量骨材として利用することが出来る。また一定
品質の骨材を焼成するための焼成温度領域も広いので、
製造上工程の管理が容易なものであった。(Examples 1 to 5) Blast furnace slag slag (average particle size of about 12μ
m) 50 parts by weight, fly ash (average particle size of about 20μ
m) 50 parts by weight and 3 parts by weight of bentonite as a binder were mixed. 12 parts by weight of water was added to this mixed powder,
Approximately 4 g was weighed with a balance, granulated into spherical shapes, and dried to obtain pellets for firing. 121 pellets in an electric furnace
An aggregate was obtained by holding at a predetermined temperature within a range of 0 to 1300 ° C. for 5 minutes. The obtained aggregate has a water absorption rate of 1.2.
% Or less, absolute dry specific gravity of less than 2, tensile strength of 150 kg
It was a good value of f / cm 2 or more. The results are shown in Table 1. Since this aggregate has a low water absorption rate, it can be used as a lightweight aggregate of structural concrete. Also, since the firing temperature range for firing a certain quality of aggregate is wide,
It was easy to control the manufacturing process.
【００１６】[0016]
【表１】 [Table 1]
【００１７】（実施例６〜９）発泡補助材として炭化珪
素０．１５重量部をさらに混合した以外は、先の実施例
と同様に、ペレットを作成し、１２３０〜１３００℃の
温度内の所定の温度で５分保持することにより骨材とし
た。結果を表２に示す。得られた骨材は、吸水率が０．
４％以下、絶乾比重が２未満、引っ張り強度が１５０ｋ
ｇｆ／ｃｍ2 以上の良好なものであった。(Examples 6 to 9) Pellets were prepared in the same manner as in the previous example except that 0.15 part by weight of silicon carbide was further mixed as a foaming auxiliary material, and pellets were prepared at a temperature of 1230 to 1300 ° C. Aggregate was obtained by holding at the temperature of 5 minutes. Table 2 shows the results. The obtained aggregate has a water absorption of 0.
4% or less, absolute dry specific gravity of less than 2, tensile strength of 150k
It was a good value of gf / cm 2 or more.
【００１８】[0018]
【表２】 [Table 2]
【００１９】（実施例１０〜１２）高炉水滓スラグ５０
重量部、フライアッシュ４５重量部、廃ガラス粉末（飲
料水の廃ビンガラスをボールミルで約５μｍに粉砕）５
重量部、粘結材としてベントナイト３重量部、及び発泡
補助材として炭化珪素０．１５重量部を混合した以外
は、先の実施例と同様に、ペレットを作成し、１２５０
〜１３００℃の温度内の所定の温度で５分保持すること
により骨材とした。結果を表３に示す。得られた骨材
は、吸水率が０．１％以下、絶乾比重が２未満、引っ張
り強度が１４５ｋｇｆ／ｃｍ2 以上の良好なものであっ
た。(Examples 10 to 12) Blast furnace water slag 50
Parts by weight, fly ash 45 parts by weight, waste glass powder (waste bottle glass of drinking water is pulverized to about 5 μm with a ball mill) 5
1250 parts by weight were prepared in the same manner as in the previous example except that 3 parts by weight of bentonite as a binder and 0.15 parts by weight of silicon carbide as a foaming auxiliary material were mixed.
An aggregate was obtained by holding at a predetermined temperature within a range of ˜1300 ° C. for 5 minutes. The results are shown in Table 3. The obtained aggregate had good water absorption of 0.1% or less, absolute dry specific gravity of less than 2, and tensile strength of 145 kgf / cm 2 or more.
【００２０】[0020]
【表３】 [Table 3]
【００２１】（実施例１３〜１５）高炉水滓スラグ６０
重量部、フライアッシュ３５重量部、廃ガラス粉末５重
量部、粘結材としてベントナイト３重量部、及び発泡補
助材として炭化珪素０．１５重量部を混合した以外は、
先の実施例と同様に、ペレットを作成し、１１４０〜１
１８０℃の温度内の所定の温度で５分保持することによ
り骨材とした。結果を表４に示す。いずれも良好な骨材
であった。(Examples 13 to 15) Blast furnace water slag 60
Parts by weight, 35 parts by weight of fly ash, 5 parts by weight of waste glass powder, 3 parts by weight of bentonite as a binder, and 0.15 parts by weight of silicon carbide as a foaming auxiliary material, except that
As in the previous example, pellets were prepared and 1140-1
An aggregate was obtained by holding at a predetermined temperature within 180 ° C. for 5 minutes. The results are shown in Table 4. All were good aggregates.
【００２２】[0022]
【表４】 [Table 4]
【００２３】（実施例１６）高炉水滓スラグ４０重量
部、フライアッシュ５５重量部、廃ガラス粉末５重量
部、粘結材としてベントナイト３重量部、及びび発泡補
助材として炭化珪素０．１５重量部を混合した以外は、
先の実施例と同様に、ペレットを作成し、１３００℃の
温度で５分保持することにより骨材とした。結果を表５
に示す。Example 16 40 parts by weight of blast furnace slag slag, 55 parts by weight of fly ash, 5 parts by weight of waste glass powder, 3 parts by weight of bentonite as a binder, and 0.15 parts by weight of silicon carbide as a foaming auxiliary material. Except that the parts were mixed
As in the previous example, pellets were prepared and held at a temperature of 1300 ° C for 5 minutes to obtain an aggregate. Table 5 shows the results
Shown in
【００２４】[0024]
【表５】 [Table 5]
【００２５】（比較例１〜４）高炉水滓スラグ１００重
量部、粘結材としてベントナイト３重量部および発泡補
助材として炭化珪素０．１５重量部を混合した以外は、
先の実施例と同様に、ペレットを作成し、１２００〜１
２７０℃の温度内の所定の温度で５分保持することによ
り骨材とした。結果を表６に示す。得られた骨材は、吸
水率が６％以上もあり、コンクリート用骨材としては不
適当なものであった。(Comparative Examples 1 to 4) Except that 100 parts by weight of blast furnace slag slag, 3 parts by weight of bentonite as a binder and 0.15 parts by weight of silicon carbide as a foaming auxiliary material were mixed.
As in the previous example, pellets were prepared and 1200-1
An aggregate was obtained by holding at a predetermined temperature within 270 ° C. for 5 minutes. Table 6 shows the results. The obtained aggregate had a water absorption rate of 6% or more and was unsuitable as an aggregate for concrete.
【００２６】[0026]
【表６】 [Table 6]
【００２７】（比較例５、６）高炉水滓スラグ７０重量
部、フライアッシュ２５重量部、廃ガラス粉末５重量
部、粘結材としてベントナイト３重量部および発泡材と
して炭化珪素０．１５重量部を混合した以外は、先の実
施例と同様に、ペレットを作成し、１１４０℃、１１６
０℃の温度で５分保持することにより骨材とした。結果
を表７に示す。得られた骨材は、発泡が顕著と成りすぎ
たために、吸水率が高く、一般軽量骨材としては使用可
能な領域であるが、構造用コンクリート骨材として使用
する場合には限界のあるものであった。Comparative Examples 5 and 6 70 parts by weight of blast furnace water slag slag, 25 parts by weight of fly ash, 5 parts by weight of waste glass powder, 3 parts by weight of bentonite as a binder and 0.15 parts by weight of silicon carbide as a foaming material. Pellets were prepared in the same manner as in the previous example except that 1140 ° C. and 116 were mixed.
It was made into an aggregate by holding it at a temperature of 0 ° C. for 5 minutes. Table 7 shows the results. The obtained aggregate has a high water absorption rate due to excessive foaming, and it is a usable region as a general lightweight aggregate, but there is a limit when used as a structural concrete aggregate. Met.
【００２８】[0028]
【表７】 [Table 7]
【００２９】（比較例７、８）高炉水滓スラグ３０重量
部、フライアッシュ６５重量部、廃ガラス粉末５重量
部、粘結材としてベントナイト３重量部および発泡材と
して炭化珪素０．１５重量部を混合した以外は、先の実
施例と同様に、ペレットを作成し、１２００℃、１２５
０℃の温度で５分保持することにより骨材とした。結果
を表８に示す。得られた骨材は、吸水率が１４％以上と
高く、コンクリート用骨材としては耐久性の面で限界が
あるものであった。Comparative Examples 7 and 8 30 parts by weight of blast furnace slag slag, 65 parts by weight of fly ash, 5 parts by weight of waste glass powder, 3 parts by weight of bentonite as a binder and 0.15 parts by weight of silicon carbide as a foaming material. Pellets were prepared in the same manner as in the previous example, except that
It was made into an aggregate by holding it at a temperature of 0 ° C. for 5 minutes. Table 8 shows the results. The obtained aggregate had a high water absorption rate of 14% or more, and had a limit in terms of durability as an aggregate for concrete.
【００３０】[0030]
【表８】 [Table 8]
【００３１】[0031]
【発明の効果】以上説明したこの発明によれば、廃棄物
である高炉スラグおよびフライアッシュを有効に再利用
でき、環境保全上大いに貢献するもので、しかも、得ら
れる人工軽量骨材は、低比重、低吸水率及び高強度を有
しており、コンクリート用骨材として用いた場合、高強
度軽量コンクリートとして、土木、建築等の分野におい
て極めて有益に利用することができる。According to the present invention described above, waste blast furnace slag and fly ash can be effectively reused, which greatly contributes to environmental protection, and the obtained artificial lightweight aggregate has a low cost. It has a specific gravity, low water absorption and high strength, and when used as an aggregate for concrete, it can be extremely usefully utilized as a high-strength lightweight concrete in the fields of civil engineering and construction.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 久坂 浩司 千葉県佐倉市大作二丁目４番２号 秩父小 野田株式会社中央研究所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koji Kusaka 2-4-2 Daisaku, Sakura-shi, Chiba Chichibu Onoda Co., Ltd. Central Research Laboratory
Claims (6)
とし、これにベントナイト等の粘土類及び所望により炭
化珪素を添加した混合原料を造粒・成形し、焼成してな
ることを特徴とする人工軽量骨材。1. An artificial lightweight, characterized in that blast furnace slag and fly ash are used as main raw materials, and a mixed raw material obtained by adding clays such as bentonite and silicon carbide if desired is granulated, molded and fired. aggregate.
アッシュ６０〜４０重量部を主原料とすることを特徴と
する請求項１記載の人工軽量骨材。2. The artificial lightweight aggregate according to claim 1, wherein 40 to 60 parts by weight of blast furnace slag and 60 to 40 parts by weight of fly ash are used as main raw materials.
して用いることを特徴とする請求項１若しくは２記載の
人工軽量骨材。3. The artificial lightweight aggregate according to claim 1, wherein the waste glass is used by replacing a part of fly ash.
ち、５〜２５重量部を廃ガラスで置き換えてなることを
特徴とする請求項２記載の人工軽量骨材。4. The artificial lightweight aggregate according to claim 2, wherein 5 to 25 parts by weight of 60 to 40 parts by weight of fly ash is replaced with waste glass.
ッシュ６０〜４０重量部から成る主原料に、粘結材とし
てベントナイト等の粘土類及び所望により発泡補助材と
して炭化珪素を添加、混合して成形し、１１００℃以上
の温度で焼成することを特徴とする人工軽量骨材の製造
方法。5. A main raw material consisting of 40 to 60 parts by weight of blast furnace slag and 60 to 40 parts by weight of fly ash is added and mixed with clay such as bentonite as a binder and, if desired, silicon carbide as a foaming auxiliary material. A method for producing an artificial lightweight aggregate, which comprises molding and firing at a temperature of 1100 ° C. or higher.
ち、５〜２５重量部を廃ガラスで置き換えてなることを
特徴とする請求項５記載の人工軽量骨材の製造方法。6. The method for producing an artificial lightweight aggregate according to claim 5, wherein 5 to 25 parts by weight of the fly ash of 60 to 40 parts by weight is replaced with waste glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25673095A JPH0977543A (en) | 1995-09-08 | 1995-09-08 | Artificial lightweight aggregate and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25673095A JPH0977543A (en) | 1995-09-08 | 1995-09-08 | Artificial lightweight aggregate and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0977543A true JPH0977543A (en) | 1997-03-25 |
Family
ID=17296656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25673095A Pending JPH0977543A (en) | 1995-09-08 | 1995-09-08 | Artificial lightweight aggregate and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0977543A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1549427A1 (en) * | 2002-08-23 | 2005-07-06 | James Hardie International Finance B.V. | Synthetic hollow microspheres |
| EP1641556A1 (en) * | 2003-05-16 | 2006-04-05 | James Hardie International Finance B.V. | Methods for producing low density products |
| WO2008087199A1 (en) * | 2007-01-18 | 2008-07-24 | Sika Technology Ag | Light weight aggregate |
| US8993462B2 (en) | 2006-04-12 | 2015-03-31 | James Hardie Technology Limited | Surface sealed reinforced building element |
| US9016090B2 (en) | 2013-06-12 | 2015-04-28 | Hamid Hojaji | Glass microspheres comprising sulfide, and methods of producing glass microspheres |
| CN106365611A (en) * | 2016-08-29 | 2017-02-01 | 中南大学 | Method for preparing ceramsite from waste manganese ore slag |
| US9643876B2 (en) | 2015-10-04 | 2017-05-09 | Hamid Hojaji | Microspheres and methods of making the same |
| US10196296B2 (en) | 2015-01-17 | 2019-02-05 | Hamid Hojaji | Fluid permeable and vacuumed insulating microspheres and methods of producing the same |
| CN112279605A (en) * | 2020-10-22 | 2021-01-29 | 湖北工业大学 | Underground filling cementing material and preparation method and application thereof |
| CN112500011A (en) * | 2020-12-15 | 2021-03-16 | 上海建工建材科技集团股份有限公司 | Preparation method of steel carbide slag lightweight aggregate and concrete containing steel carbide slag lightweight aggregate |
| EP3805177A1 (en) * | 2019-10-10 | 2021-04-14 | Khan, Abbas | A method of producing lightweight ceramic sand from lignite fly ash, composition and use thereof |
-
1995
- 1995-09-08 JP JP25673095A patent/JPH0977543A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1549427A4 (en) * | 2002-08-23 | 2008-04-16 | James Hardie Int Finance Bv | Synthetic hollow microspheres |
| EP1549427A1 (en) * | 2002-08-23 | 2005-07-06 | James Hardie International Finance B.V. | Synthetic hollow microspheres |
| EP1641556A1 (en) * | 2003-05-16 | 2006-04-05 | James Hardie International Finance B.V. | Methods for producing low density products |
| EP1641556A4 (en) * | 2003-05-16 | 2008-04-16 | James Hardie Int Finance Bv | Methods for producing low density products |
| US8993462B2 (en) | 2006-04-12 | 2015-03-31 | James Hardie Technology Limited | Surface sealed reinforced building element |
| WO2008087199A1 (en) * | 2007-01-18 | 2008-07-24 | Sika Technology Ag | Light weight aggregate |
| EP1955986A1 (en) * | 2007-01-18 | 2008-08-13 | Sika Technology AG | Light weight aggregate |
| US9016090B2 (en) | 2013-06-12 | 2015-04-28 | Hamid Hojaji | Glass microspheres comprising sulfide, and methods of producing glass microspheres |
| US10196296B2 (en) | 2015-01-17 | 2019-02-05 | Hamid Hojaji | Fluid permeable and vacuumed insulating microspheres and methods of producing the same |
| US9643876B2 (en) | 2015-10-04 | 2017-05-09 | Hamid Hojaji | Microspheres and methods of making the same |
| CN106365611A (en) * | 2016-08-29 | 2017-02-01 | 中南大学 | Method for preparing ceramsite from waste manganese ore slag |
| EP3805177A1 (en) * | 2019-10-10 | 2021-04-14 | Khan, Abbas | A method of producing lightweight ceramic sand from lignite fly ash, composition and use thereof |
| CN112279605A (en) * | 2020-10-22 | 2021-01-29 | 湖北工业大学 | Underground filling cementing material and preparation method and application thereof |
| CN112279605B (en) * | 2020-10-22 | 2022-04-29 | 湖北工业大学 | Underground filling cementing material and preparation method and application thereof |
| CN112500011A (en) * | 2020-12-15 | 2021-03-16 | 上海建工建材科技集团股份有限公司 | Preparation method of steel carbide slag lightweight aggregate and concrete containing steel carbide slag lightweight aggregate |
| CN112500011B (en) * | 2020-12-15 | 2022-05-24 | 上海建工建材科技集团股份有限公司 | Preparation method of carbonized steel slag lightweight aggregate and concrete containing carbonized steel slag lightweight aggregate |
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